Find the following values without a calculator.
Give your answers in this manner. (Eg 1, 2, 3, 4)
- 3 min 5 s = _____ s
- 4 h 10 min = _____ min
- 260 s = 4 min _____ s
- 433 min = _____ h 13 min
(a)
1 min = 60 s
3 min 5 s
= 3 x 60 + 5
= 180 + 5
= 185 s
(b)
1 h = 60 min
4 h 10 min
= 4 x 60 + 10
= 240 + 10
= 250 min
(c)
60 s = 1 min
240 s = 240 ÷ 60 = 4 min
260 s
= 240 + 20
= 4 min 20 s
(d)
60 min = 1 h
420 min = 420 ÷ 60 = 7 h
433 min
= 420 + 13
= 7 h 13 min
Answer(s): 185, 250, 20, 7